Real Depth Apparent Depth

What happens to light during total internal reflection?

• The angle of incidence is greater than the critical angle.

• The angle of reflection is the same as the critical angle.

• The angle of refraction is less than the critical angle.

• The angle of incidence is zero.

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

NGSS.HS-PS4-5

Fiber optic cables work because of the principle of _____.

• total internal refraction

• incomplete internal refraction

• total internal reflection

• partial internal reflection

Choose the correct statement that describes what happens to the ray of light if the critical angle is 48^o and the angle of incidence is 48^o

• refract

• totally internally reflect

• travel along the boundary

What is total internal reflection

• Where a wave is refracted at the boundary between a dense medium and a less dense medium when the angle of incidence is greater than the critical angle.

• Where a wave is refracted at the boundary between a dense medium and a less dense medium when the angle of incidence is smaller than the critical angle.

• Where a wave is reflected at the boundary between a dense medium and a less dense medium when the angle of incidence is greater than the critical angle.

• Where a wave is reflected at the boundary between a dense medium and a less dense medium when the angle of incidence is smaller than the critical angle.

Tags

NGSS.HS-PS4-5

see image

• A

• B

• C

• D

Give a reason why the signal changes direction at A

• its a flat surface

• the density of the glass is greater than the density of the air

• the angle of incidence is more than 90 degrees

• The density of the glass is less than the density of the air

^{Which one is true for the formation of a mirage?}

• The light first goes through TIR and then passes through the colder layers of air to hotter layers. (TIR is total internal reflection)

• The light first goes through TIR after passing through the colder layers of air to hotter layers.

• The light first goes through TIR and then passes through the hotter layers of air to colder layers.